Question about 2002 GMC Envoy XL

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AC blows hot air

I disconnected battery on 2002 envoy to reset ''service engine soon'' light - now ac blows hot air and idle is very rough - sometimes dies at idle

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Posted on May 25, 2009

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Sounds like you may have disconnected the battery. Does the rough idle only happen when the defroster or A/C is on? If so clean your throttle body with throttle body cleaner with the battery disconnected. When finished, drive it for 5 or so miles with the defroster / AC off to let the computer relearn the settings. This will solve your problem.

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